Jarring machine



May 8, 1923. 1,454,490

A. B. SCHUYLER ET AL JARRING MACHINE Filed April 21, 1919 zsheets-sineet 1 Patented May 8, 1923.

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LBERT B. SCHUYLER AND ROSS B. SGHUYLER, or ROCHESTER, NEW-$103K,

JARRING- MACHINE.

Application filed April 21,1919. Seria1'No. 291,619.

To all who-m it may concern I Be it known that we, ALBERT B. SOH-UYLER and Ross B. SOHUYLER, citizens of the United St-ates, and residents of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Im rovements in Jarring Machines, of which the following is a specification.

The present invention relates to a jarring machine and it has for an object to impart a jarring action to objects, such a machine having particular advantages when used with castings from which the cores have not been removed as a jarring action will break up the cores and cause their discon: nection from the castings.

To this and other ends the'invention consists of certain parts and combinations of parts, all of which will be hereinafter described, the novel features being'pointed out in the appended claims.

' In the drawings:

Fig 1 is a side View of one embodiment of the invention;

Fig. 2 is, an enlarged section through the air hammer and the upper portion of the machine shown in Fig. 1, a casting being arranged in the holding means of the machine;

Fig. 3 is a top view of the hammer showing th casing or cover removed;

Fig. 4 is a side view of the hammer;

Fig. 5 is a side view, of another, embodiment of the invention; and g V Fig. 6 isa detail view of the embodiment shown in F ig; 5.

Referring first to the embodiment shown in Figs. 1 to 4, 1 indicates the frame of the machine. On this frame is arranged the holding means for the casting or object 2. This holding means in this instance comprises a member 3 preferably in the form of a slide or plunger operating in a guide 4: pro-. jecting forwardly from the frame 1. The slide 3 has a limited free movement in a vertical direction, its movement being defined by a collar 5 cooperating in one direction 'of its movement with the abutment 6 formed by the upper face of the guide arm a and in the direction of its movement by the abutment 7 formed by the lower end of the hammer casing 8 whichwill behereinafter more particularly, described. The holding means also embodies a second member 9, in this instance in the form of a slide or plunger guided in a bracket arm 10 preferably bolted to the front face of theframe 1. This.

slide also may be guided-in a tube 11 below the guide 10 supported at its lower end by an arm '12 bolted to thefront face of the frame 1. Normally thesl'ide' or member 9 is held toward the slide or member 3 with yielding pressure, this preferably being accomplished by a helical spring 13 which bears at its lower end against a collar 14 about the guide tube 11 and its upper end I agalnst a collar 15 secured to the slide 9 between the guides'lO and '11. The slide Qmay be moved away from the slide 3 by any suit able means such'as a 'treadle 16 pivote'd at, 17 to the frame 1 and connected bya rod 18 with the lower end of the slide 9 The slide or'work holding member 3' in addition to acting tosupport or hold'th e work, alsov acts as ani'mpact' receivingmemher to receive the blows from a rapidly moving impact member l9 of any suitable construction. In this instance,- this impact member moves in'line with the impact receiving member 3 within the casing 81 of a pneumatic hammer.

The pneumatic hammer consists, in this embodiment, of a piston or plunger 20 rigidly secured to the upper end of the impact member 19 and operating within ,a chamber 21 in the casing 8 being held in its uppermost position by asprin-g 22 which surrounds the impact member 19; below the piston 20. The piston 20 rests against a' diaphragm 23 of distensible material such as rubber, the diaphragm being secured in place by dividing the casing 8 into two parts and placing the diaphragm between the parts which are held together by bolts 24. The casing is so formed above the diaphragm that an abutment 25 is provided which limits the movement of the diaphragm in an upward direction under the action of the spring 22. Fluidsuch as compressed air is admitted by a pipe 26 to theinlet 27 which is controlled by a valve 28 while. the

fluid is exhaustedthrough an exhaust 2 9 controlled by a valve 30. These two valves are preferably controlled by an electric motor 31 supported onthe frame of the machine and connected by a belt 32 withf a pulley 33 which is arranged upon a shaft 3 1. on which an'eccentric 35 operates with an eccentric ring 36 on a rod- 37 whose upper end is connected to a lever 38 pivoted at 39 to a bracket 40', the bracket being supported on the upper casting of the hammer casing 8. The lever 38 has two arms which connect with the stems 4:1 and 42 of the valves 30 and 28 respectively. These connections with the valves 30 and 28 are such that such valves are opened alternately, the valve 30 being opened with the downward movement of the lever 38 and the valve 28 being opened with the upward movement of the lever 38. The lever 38 transmits motion to the valve 30 through a collar 43, depressing said collar against a spring 4 1 which tends to seat the valve 30 on the upper movement of the lever 88. The lever 38 transmits motion .to the valve 28 through a collar 45 which effects a compression of the spring 46, the latter tending toseat the valve 28 on the downward movement of the lever 38. A slight clearance is provided between the collar L3 and the'lever 38 when the latter is in its uppermost position so that the valve 30 will be closed before the valve 28 is opened.

The admission of air through the valve 28 above the diaphragm 25 causes the diaphragm to be distended in a downward direction, thus producing pressure upon the piston 20 to depress the impact member 19. Almost immediately the valve 28 closes and the valve 30 opens permitting the impact member to return under the action of the spring 22. In this way a very rapid movement of the impact member 19 is obtained and the impact member by engaging the impact receiving and holding device 3 pro duces a jarring action upon the work piece 2. Admission of the air to the motor may be controlled by a valve 48 controllable by hand or by a foot lever 49 through a rod 50.

To the end that the impact member may operate without holding the object in the machine, the impact receiving member may have an arm 51 projected from the collar 5 forwardly, and at the outer end of this arm a clamp 52 may be secured for holding a sharp pointed tool This tool will vibrate rapidly under the action of the impact member 19 and may be used for digging into those cores in which the castings cannot be held in the holding means.

In the embodiment of the invention shown in Figs. 5 and 6, a pneumatic hammer 5 1 of a known commercial construction is fitted in a sleeve 55 which is bolted to the frame of the machine in place of the construction shown in Fig. 1, a U-shaped strap 56 being secured at opposite ends to the sleeve and passed above the hammer. The piping 26 connects with the inlet of the hammer and the valve 57 of the hammer is connected by a rod 58 with the lever48 the latter being controllable by hand as well as through the foot treadle 49 by way ofthe rod 50. The impact member 59 of the hammer cooperates with the upper end of the impact receiving member 3 which in this instance is held in its uppermost position by a spring 60, its upper movement being limited by a collar 61 on the impact receiving member 3.

In both embodiments of the invention, the work 2 is placed between the impact receiving member 3 or 3 and the lower work holding member 9, the latter being depressed by the treadle 16 so as to introduce the work between the two members' The treadle is released gradually so that the work will be properly engaged between the members and then the valve 47 is opened either through the treadle 49 or the lever 48. This admits air to the pneumatic hammer and the impact member of: the hammer rapidly moves to engage the impact receiving member and thus to transmit vibrations or jars to the work piece 2. The spring 13 cushions this jarring action and prevents the breaking of the work piece.

What we claim as our invention and desire to secure by Letters Patent is:

1. A jarring machine comprising a rapidly movable impact member, a blow receiving and work holding member movable in a line with the 'line of movement of the impact member and being independent in its movement from the impact member, another movably mounted work holding member arranged to cooperate with the blow receiving and work holding member, and resilient means for supporting both of said work holding members.

2. A jarring machine comprising a movable blow receiving and work holding member, another movable work holding member arranged to hold the work against the blow receiving and work holding member, spring means acting on one of said holding members to resiliently support the work, and a rapidly moving impact member for cooperation with the blow receiving and work holding member.

3. A jarring machine comprising a movable blow receiving and work holding member, another movable work holding member yieldingly supported and adapted to hold the work to the blow receiving and work holding member, and a rapidly moving impact member for cooperation with the blow receiving and work holding member, said impact member being movable independently of the blow receiving member.

4. A jarring machine comprising a blow receiving and work holding member having a sliding movement, a work holding slide yieldingly held toward the first named sliding member to hold the work between the slides. means for moving the last mentioned slide away from the first named slide, and a rapidly moving impact member for cooperation with the first named slide in the direction of the line of movement of said slide.

5. A jarring machine comprising a vertically movable member, an impact member movable to cooperate with the vertically movable member in the direction of the line of movement of said vertically movable member, a second vertically movable member cooperating with the first named vertically movable member to hold the Work,

a spring acting on the second named Vertically movable member, and means under the control of an operative to move the 10 second named member away from the first named member.

ALBERT B. SCHUYLER. ROSS B. SCHUYLER. 

